Crystal

I know it's been a long time since the games came out and all... But maybe someone can help. Well, I have a problem with the shade. It keeps disappearing. I hit the blue crystals couple of rounds, then I get a message that the shade left. Can't end battle cause the crystals are still hostile (take no damage) I can't dispell the barriers to go the side rooms. If I walk around a bit shade comes back and I have to repeat the whole thing over again. How can I kill the shade if it's just running off??